Lead lined pickling tank



Dec. 8, 1931. R. H. BoLr-:N

LEAD LINED PICKLING TANK Filed Oct. 50, 1928 2 Sheets-Sheet 1 Dec. 8, 1931'. R, H. BoLEN 1,835,843

' LEAD LINED PIGKLING TANK F-led Oct. 50, 1928 2 Sheets-Sheet 2 INVENTOR.

A TTORNEY.

Patented Dec. 8, 1931 caire-D ,STATES PATENT :OFFICES RALPH E. BoLEN, or ASHLAND, KENTUCKY, Y.essreNoR To THE AMERICAN ROLLING l i MILL COMPANY, or MInnLmfowN, oHio, A. conroneTIoN or OHIO LEAD LINED -PICKILING lTANK ,y

Appncationfled october so, 1928. seriai No. 316,030.

It isthe broad object of myy invention to provide anew construction for pickling tanks of the type in which a wooden tank body is interiorly linedwithlead, or of `.analogous types, whereby the first cost mayber lessened and the life greatly lengthenedv Pickling tanks of this type give considerable trouble. vWhen used, for example, in a spiderpickler for iron or steel sheets, they .must contain hot acid.k Leakage occurs through the acid proof lining, and acid is splashed over the edges and runs down the outer walls of the tank. The tank parts are rapidly attacked; when acid gets down between the lining and the tank, the corrosion proceeds without check, and itis not generally Vpossible torepair the tank body or insert a new part in place of a defective one without'dismantling the entire assembly. i

It is the object of my invention tofprovide aconstruction wher-eby'the use of small bolts, nails, screws, dowels or carpentry f joints, which for strength are dependent on line and accurate fitting, has been avoided. It can readily be seen that in pickle tank construc tion the use of any of ythese features is undesirable due to their susceptibility tojdeterioration from the action of acid solutions,which from overflow, leakage, or fumes is always present in a picking plant. In this invention the individual members are joined and held securely in place with simple butt and yshoulder joints (which maintain maximumscotions of the framed timbers) and aminimum of external tie rods all of which are exposed so that it may individually be replaced without dismantling the tank .and Yeven without interrupting its use, and sothat they may fre,-

quentlybe flushed with water, whereby their life'may be greatly lengthened.

It is another lobject of my invention to provide an open work frame-work with spaces between the component timbers.y This per-` mits the acid which may leak through imperfections in the inner lining to Ydrain away instead of seepingin between the timbers' and lining and being held there. It permits the more ready location of leaks. Further Vit permits the flushing of the individual timbers with-water .to remove api-d which may have the drawings which form-a seeped through the lining or spilled over the Y sides.

*These and otherrobjects ofmy invention which will be pointed yout hereinafter or will be apparent Ato one skilled in the art vupon reading these specications,gI laccomplish by that certain construction and arrangement of parts :of which I shall now describe a preferred i embodiment, reference being made to part hereof. In the drawings f Figure l is a top plan view of one form of my tank. j v

Figure 2 is a side elevation thereof.

Figure 3 is an end elevation. A yFigure 4 is an isometric'view of a corner of my tank with the lead lining removed to show the framework construction. f L

*Y It is to be understood that my construction is applicable to tanks of various types. The

preferred embodiment which I shalln-ow describe is a tank suitable for use i-'n a spider pickl'er; but' the shape or proportions shown are not a limitation upon my. invention.

Referenceto Figure l shows a top frame work composed ofend members 2 and side members ,1, the purposes of which are:

l. By means of the notched joints (9) Figure 4 toprevent the inward collapse of vertical end timbers 8 andside timbers ll, (when tank is empty) c i 2. Through four Asubstantially exposed vertical tie rods 10,.Figure 3 and Figure 4, and bottom stringers, to provide a means of verticallysecuring the tank together as a unit.

' 8. To provide a Asmooth regular surfaceV to whichthe cured.- .o v i. The. end members2 may ybehoused out at inner lead lining'may'- be sepoints 2A to receive the-ends of side timbers l which are stepped as shown most clearly at 2b' i-gure 4). Thusthru this step joint, side members (l) are held down by end members (2). End members 2 are in turn held down by means of tie rods (.10) to the bottom stringersp v l The bottom comprises timbers 'orslats 4 of suitably j heavy construction held apart and interspaced by spacers 5,'which will more particularly 4be described hereinafter. v

roo

The floor of the tank rests upon stringers 6 as shown in the several views. The ends of the timbers 4 are notched as is shown most clearly at 7 in Figure4 to receive the ends of the timbers 8 which make up the end walls. These timbers stand vertically upon the notched ends of the floor timbers and are interspaced by spacers 5a of which there may be as many horizontal rows as the length of thev timbers makes advisable. Three rows are shown in Figure 3. The top of timbers 8 are notched inwardly, and the top end member 2 is notched outwardly as at 9 (Figure 4). This construction forms a joint betweenthe top frame and the end walls. Tie rods 10 join the top frame and the stringers 6, binding together the end construction. But 'it will be clear that if these tie rods be loosened a little, the stringers 14, 14a, etc., removed, one or more of the end timbers 8 may be removed outwardly for replacement and repair. Tn use, in order to resist the outward pressure of the hydrostatic head vwithin the tank, means must be taken to prevent such an outward movement of the timbers, and such means are hereinafter to be described.'

The side walls are similar to the end walls in that they comprise upright timbers 11, interspaced by rows of spacers 5b (Figure 2) and notched andlitted into the top side frame members 1, ashas been described for the timbers 8. Since the row of timbers 11 forming a side wall falls above-'and parallel to the outermost iioor timber, I prefer to use as said outermost floor timber en .either side, a timber-4a which is less in height than the other floor timbers 4. This, where the width of floor timbers and thickness of side timbers is the same', is less expensive than KVnotching both the outermostfloor timber and all of the side timbers in a construction similar to the jointl with theytop side member 2. The latter construction may .however be usedif desired. Or indeed any other type of joint between floor and side timbers may if desired be substituted for. that which have shown,

and which Yhas the two chief advantages of economy and easy demountability. WV hat has been said aboutthe easy individual removability of the timbers 8'will apply also to the timbers 11. y. Y

Heavy side stringers 12. rest upon the supporting stringers 6 and lie parallel to and outside of the outermost floor timbers 4a. The ends of the stringers 12 project beyond the floor proper, and tie rods 13 and 13a bind vthe whole 'into a. unitary structure. Further the ymembers 12 and 4a together with the nextone of the iioor timbers 4 form a socket for the feet of the timbers 11, as is very clearly shownin Figure 4.

' Other stringere 12a, 12b, etc. maybe located above and parallel to the stringers 12, and

may be bound together by tie rods 13b,- 130, Y

etc. They may be graduated in size in proportion to the hydrostatic pressure which they must withstand. They must be thick enough to bear with even pressure throughout their length upon the timbers 11. Their functionis to prevent the outward movement of these timbers whichthe pressure of .the acid upon the lining tends to produce,

and also to strengthen the tank framework in such other ways as will 'be quite obvious. They may be supported by vertical timber struts 17 and 17a where desired; or they may be otherwise supported. 1 Y To preventv the outward movement of the end timbers 8, I provide stringere 14, 14a, etc. transverse to these timbersy and tied with rods y15, 15a, etc. To prevent racking and provide stiifness, T may tie the timbers 12, 12a, ctc. with diagonal tie rods, 16, 16a, etc. It will be noticed that all of the tie rods are exposed. lt is not necessary in my construction to run the rods through the length of the timbers nor to have them enclosed within the body of the walls. l have found that enclosed rods, instead ofbeing protected from acid attack, are more liable to it and have a shorter life than rods which are eX- posed and can be and are frequently flushed with water. The rods are preferably of acid proof metal. They may b e individually replaced without interfering with the service Y of the tank.

The spacers 5, 5ft, etc., may be of any material desired; but I prefer to `make them of acid-proef stoneware. They khave continuouslyto resist the pressure ofthe members and give rigidity to the sides; and anydisintegration through acid attack or otherwise will loosen up the entire structure. 1Wooden spacers may be used if desired; but thin wood is liable to. more ready attack, andI prefer to use a' substance which will not be attacked atl all, so that the resistance of the timbers themselves will measure the repair-free life ofthe tank. 1

An acid proof inner lining of continuous orv membraneous character is placed within the tank, andV preferably jointed to the outside ofthe top frame. t is an advantage of my construction that Vit permits the use of such a lining as lead;but it is not restricted to such a lining, and mayequally well be used with other and thicker ones. Linings which have aninsulating aswell as an acid resistant character may be used; or such a lining as may comprise courses of acid proof brick laid'in a suitable cement. But a lining which is neither thick nor rigid is greatly to be preferred forimany reasons; and the construction of my tank is especially'adapted to the use of ainembraneous lining which relies -upon Vmy frame-work for support. Ina tank of the character described, l use a lining of C. P. lead, indicatedat 18 in Figure 4.

`When lined, my tank has a construction ico in which each timber is exposed upon' three sides. The spacers are not thick; but Vspace the timbers sutiiciently to ensure this result. In the embodiment I have described, they may be, say, 1X2 inch thick. Thus each timber may be iiushed regularly with water, and the eiiect of acid leakage done away with or greatly minimized through much dilution. No attempt is made to secure a liquid-tight connection between timbers and lining, so that the flushing will be more or less eiective even behind the timbers. Again, when a leak occurs in the lining, the acid speedily drains away and is not impounded against the frame. The nature and location of the leak can readily be determined, and the tank drained for a quick repair, whereas in a tight wooden tank construction, leakage will usually make itself evident after and through the process of attacking the structure. And a repair, while stopping leakage, will not prevent the further disintegration of the wood from the acid which has escaped.

Modications in my invention to adapt it to various tank sizes and shapes may be made without departing from the spirit of my invention.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is l. In a pickling tank, the combination of a sheet lead lining and a framework to support said lining, said frameworkV comprising interspaced members exposing said lining.

2. In a pickling tank, a lining and a framework to support said lining, said framework comprising timbers interspaced so that each timber is exposed substantially upon three sides.

3. In a pickling tank a construction comprising separate bottom, side and end walls all comprising timbers and spacers therebetween whereby an opeii-work construction is effected, means for supporting said bottom, side and end walls in relationship, andv a lining in said tank supported by said bottom, side and end walls and substantially exposed by said open-work construction.

4. In a tank construction, a bottom supporting separate side and end walls, said walls formed of timbers with interspaced spacers therebetween, means for holding said members in relationship, anda lining in said tank supported by said members.

5. In a tank construction, a bottom comprising timbers side by sidewith spacers therebetween, separate side and end walls comprising timbers side by side with spacers therebetween and means for holding said bott-om, sides and end walls in assembly and in relationship, and a lining in said tank supported by said bottom, side and end walls and substantially exposed between said timbers.

6.`- Infatank construction, a bottom: coinprisingftimbers sideby side with spacers therebetween, side and end walls comprising timbers side by side with spacers therebetweenk and means for holding saidv bottom, "i

7. .In a tank construction abottom com-` Y.

prising timbers, sidev by side with spacers therebetween, a lower portion about the edge c of said kbottom to receive the feet of side and end walls, side andY end walls stepped in saidl portion. and .comprising timbers side by side vertically with spacers therebetween, said timbers notched inwardly at the top, a top `:trame notched outwardly to receive the tops of said timbers, whereby said timbers may be rem-oved outwardly, and means for holding said side and end walls and said bottom in assembly and relationship.

8.In a tank construction a bottom comprising timbers side by side with spacers therebetween, a lower portion about the edge of said bottom to receive the feet of side and end walls, side and end walls stepped in said portion and comprising timbers side by side vertically with spacers therebetween, said timbers notched inwardly at the top, a top frame notched outwardly to receive the tops of said timbers, whereby said timbers may be removed outwardly, and means for holding said side and end walls and said bottom in assembly and relationship, said means comprisingy horizontal side and end wall stringers project-ing beyond the sides and ends and tie rods substantially exposed and connecting said projecting ends.

9. Inv a tank construction a bottom comprising timbers side by side with spacers therebetween, a lower portion about the edge of said bottom to receive the feet of side and end walls,side and end walls stepped in said portion and comprising timbers side by side vertically with spacers therebetween, said timbers notched inwardly at the top, a top frame notched outwardly to receive the tops of said timbers, whereby said timbers may vbe removed outwardly, and means for liolding said sidel and end walls and said bottom in assembly and relationship, said means comprising horizontal side and end wall stringers projecting beyond the sides Yand ends and tie rods substantially exposed and connecting saidy projecting ends, stringers supporting said bottom'and tie rods connecting said stringers and said top frame.

10. -In a tank construction a bottom com-V rising timbers side by side with spacers therebetween, a lower portion about the edge of said bottom to receive the feet of side and portion and comprising timbers side by side vertically with spacers therebetween, saidV timbers notched inwardlyat the top, a top frame notched outwardly'to receiveV the tops of said timbers7 whereby said timbers may Y'be removed outwardly, and means for hold-A ing said side and end Walls and said bottom in assembly and relationship, said means comprising horizontal side and end Wall stringels projecting beyond the sides and ends and'tie rods substantially exposedand connecting` said projecting ends, stingers supporting said bottom and tie rods connectingsaid stringers 'and' said top .frame and a lining Within said construction `of membianeons character.' Y

,Y YRALPH H. BOLEN. 

